Dental engine-bracket.



0. H. & A. I. IEIEPER. DENTAL ENGINE BRACKET. APPLIGATION FILED MAY 27 1012.

Patented Sept. 22, 1914.

a SHEETSSHEET.1.

Os Z'arEHe 0. H. & A; F. PIEPER. DENTAL ENGINE BRACKET. v APPLICATION FILED MAY 27, 1912. 1, 1 1 1 Patented Sept. 22, 1914.

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nuzntow Oscarjf. P661962 Avfiozzseiffa'c ver M G Chan c116 THE NORM. PETERS c0. PH0T0-LITH0H WASHINGTON, u 1..

O. H. & A. F. PIEPER. DENTAL ENGINE BRACKET.

v APPLIG-ATION PILED MAY 27,1912. v 1,1 1 1,1 7.7.- Patented Sept. 22, 1914 3 SHBETS-SHEET 3v N I l All gwue/wtow g rHE NORRIS PErERs 60.. PHOTO LITHO.. WASHINGTON u. u.

' UNITED TES PATENT OFFICE- H. PIEPER AND-ALPI-IONSE F. PIEPER, OF ROCHESTER, YORK.

DENTAL ENGINE-BRACKET.

Specification of Letters Patent.

Patented Sept. 22 1914.

1 Ap plication filed May 27, 1912. Serial No. 699,939.

eall when t may ncer ie it known th t we, OSCAR PIEPER oust: F. PlEPnR, both of Rochester,

o m Qf Monroe and State of New Q :1, liaveinvented "certain new and useful.

Improvements Dental Engine-Brackets andwe do hereby declare the following to be}; ranenaryma exact description of the e ii fra eret t b ing he t 'e p r indfdrawings,forminga part of this specifica. no agate the reference numeralsmarked thereon.

to an improved construction in dental en tickets, and relates to the type'of brao et mbodyirigfgenerally, a horizontal arm for the motor, the supporting a em mounted for upward or downwere ii'l ovei exit to adlust the motor to any "i iiivention furtherfcontemplates the provisio of novel constructlon and arfi rangement of parts wh ch enables a more ady drting arrnt'to be Xte ded laterally and to e, .fctually supported in any'position of 1n certain improvements and combinatlons'of parts allas w ll be hereinafter more fully describ'ed'Lthe novel features being spirite exi he c ims. a t r -m Qih id "es et e f "e n l. eng n b ac mb dying amefeflcd a ra gem n of p s,

accord ng to the present invention; Fig. 2 is a s amen tier el theline 2 2? of Fig. 1; 3 is a vertical sectional view on the line 3* 3 of Fig. at vertical sectional iewth eh a which f the m o Fis- 1s a ie n arg lele a itm, W h parts n estimate the bracket; Fig.6 is an enlarged eleyatiompartly in section, of the outer end of the supporting arm, and constituting a continuationof'lfiig. 5; Fig. 7 is a sectional View" on the line 7- of Fig. 5; Fig. 8 is a sectional view on the line 8f 8 ofFig. 7 Fig. is an enlargedsectional view of the riie 9f the cou terbal n e end i s ,c iee cee awe ,vi w in Side] present invention has for its object :AO

dii ettn nt, andal p rm t e SUP- m l 1. heseand other ends the nvent on con- I Inthedrawings: Figure 1 is a view in elevation, showing the supporting arm extended.

1 Similar reference numerals throughout the several'figures indicate the same parts. 1 designates a support which is attached in any suitable manner to the wall and provided with arms 2 which receivethehol low posts 3. Mounted upon the arms 2 is the vertical guide 4: which carries lugs 5 hav ing openings to receive the aforesaid posts 3,

whereby the guide is permitted a, swinging movementonthe support 1. The'guide 4 arranged vertically, as shown, and preferably comprises a track, adapted to receiye the carriage on which the supporting arm arranged. The carriage lncludes a vertlcal post or standard 6 provided at its upper and lower ends with wheels 7 ,preferably mount ed on roller bearings, and arranged to engage the walls of thegiiide, as shown in Fig. 2. The carriage is provided. at its lower end with the forwardly projecting portion 8't0 which the supportingarm is se: cured, the latter comprising a stationary tubular member 9. and a movable telescop ing member 10 arranged within the stationary member 9, as shown. In order to properly brace the supporting. arm,in any of its adjusted positions, there is provided a flexible device connecting the supporting arm and the carriage, and adapted to maintain the supporting arm which extended. To this end, the carriage provided at its upperend witha forwardly projecting bifurcated member 11 within which is mounted the pulley 12..

' 13 is a tube provided at its upper end with amen which are connected to the lower partof the bifurcated member 11, the op posite end of the tube being provided with corresponding arms 15which are connected to the upstanding lugs 16 arranged at the 1 outer end of the stationary member 9. A flexible device 17, preferably in the form of a wire, is secured at one end to the post 18, arranged att'he outer end of the movable member 10.

around a pulley 19 which is pivoted between the lugs 16, and issecured preferably at the end Ofthe movable member To.

b I The wire 17 passes thence around the pulley 12, through the tube'13,

accomplish this, the latter carries a projection 20, having a threaded opening to receive athreaded post 21 secured to the end of the wire 17. By this construction, it will be seen that the wire 17 constitutes a brace for the supporting arm in any position, and as the movable telescoping member 10 is moved forwardly, to lengthen the supporting arm, the ends of the wire 17 are correspondingly moved forwardly, thus changing the position of the wire so as to afford a more or less rigid brace between the carriage and the supporting arm at all times.

In order to hold the carriage in any position of vertical adjustment, there is provided a counterbalance, preferably consisting of a weight 22 connected to the carriage in the following manner. Secured at the upper end of the carriage is a laterally extending post 23 to which are attached the ends. of a cable or cord 24:, as shown in Fig. 7. The strands of the cable 24 pass thence upwardly, over the double pulley 25 which is arranged at the top of the guide, and downwardly to the weight 22, where it passes around a pulley 26. The cable 24 is provided with projections 27, fixed thereto in spaced relation above the weight, as shown in Fig. 9, and

arranged beneath said projections is a plate 28 having openings through which the cable passes. By this arrangement, in case either strand of the cable breaks, its projections together with the late 28, will drop until they engage the pn ey 26 and the remaining strand will serve to hold the weight in operative relation until the cable can be re paired.

Arranged at the upper and lower extremities of the vertical guide are spring actuated bufiiers, preferably consisting of the lungers 29 which are controlled by suitable springs 30, and are adapted to engage the carriage as the latter reaches the limit of its upward or downward movement, to prevent any sudden jar or breaking.

The motor, designated at 31, is suitably suspended at the outer end of the supporting supporting arm, as shown,

arm. 1 c

32 designates a cord passing through "the and containing the leads to the motor. The motor shaft 33 carries pulleys 34: and 35, from which move 'ment is transmitted to the hand piece, as

usual in this class of machines. To afford a rotatable support for the hand piece, there is provided a collar 86 which is adjustably secured to the motor casing, and is threaded to receive the annular ring 37 38 designates a supporting plate arranged on the collar 36 and held in p ace by the an nular ring 87, whereby it may swing to any position relatively to the motor casing.

39 designates a connecting member which may be attached to the supporting plate 38 1 in any suitable manner, as by means of the set screw 49, the connecting member 39 be= I ing adapted to support the hand piece,

which is not shown in the present .embodiguide, a supporting arm for the motor, av

carriage on'which the supporting arm is mounted, said carriage being provided with wheels arranged formovement between the walls of said guide, and a counterbalance connected to the carriage.

2. In a dental engine bracket the combi nation with a motor, of a vertically movable carriage, a supporting arm for the motor mounted on the aforementioned carriage,

and a flexible connection between the 'carriage and the supporting arm.-

3. In a dental enginebracket, the combination with a motor, of a vertically-mow able carriage, an extensible supporting arm for the motor mounted on said'carriage, and

a flexible connection between the carriage and the extensible supporting arm.

4. In a dental engine bracket, the combination with a motor, of a vertically movable 1 carriag an extensible supporting arm for the motor including a movable telescoping member, and a flexible device having its ends connected to said movable member and attached between its ends to the carriage.

5. In a dental engine bracket,flthe combination with a motor, of a vertically movable V v ,100 carriage, an extenslble supporting arm for the motor mounted on the carriage and1n eluding a movable telescoping member, .pul-

leys arranged on the carriage and'on the movable member respectively, and a flexible" device passing around said pulleys and having one end fixedly secured at the forward portion of the movable member and the other end adjustably secured tion of the movable member.

6. In a dental engine bracket, the combi-p nation with a motor, of a vertically disposed guide, carriage on which the supporting arm is mounted, said carriage being arranged forl movement between the walls of said guide,

atthe rear pora supportingarm for the motor, a

and a counterbalance connect'ed'to the car I riage. i

7.j In a dental engine bracket, thecombr nation with a motor, of a vertically disposed 1 arm for i the motor, a1

guide, a supporting carriage on wh1ch the supportlng arm is mounted, said carriage being arranged'for movement on the guide, spring buffers dis; posed at the extremities of. the guide and arranged to engage the carriage, and a counterbalance connected to the carriage.

8. In a dental engine bracket, the combination with a motor, of a vertically disposed guide, a supporting arm for the motor, a

carriage on which the supporting arm is gagement with the collar, and a supporting 10 mounted, said carriage being arranged for member surrounding the collar and held in movement on the guide, a counterbalance, position by the securing means. and a plurality of connections between the 5 counterbalance and the carriage.- OSCAR PIEPER' 9. In a dental engine bracket, the combi- ALPHONSE PIEPER' nation With a motor casing embodying a Witnesses: bearing, a collar adjustably secured on the RUSSELL B. GRmn'rH, bearing, securing means having threaded en? H. E. STONEBRAKER.

copies of this pstent may be obtained for five cents each, by addressing the Gommisstoner of Patents,

Washington, D. G." i 

